This is a microblog [as Tumblr is a microblogging site]. Let the microblogging start. You may call me by SI, for Scientific Inquiries. I am interested in everything from comic books to science fiction.

 

All religions, arts and sciences are branches of the same tree.

Albert Einstein 

thequantumlife:

Astronomers put forward new theory on size of black holes
Professor Andrew King from the Department of Physics and Astronomy, University of Leicester, said: “Almost every galaxy has an enormously massive black hole in its centre. Our own galaxy, the Milky Way, has one about four million times heavier than the sun. But some galaxies have black holes a thousand times heavier still. We know they grew very quickly after the Big Bang.”
“These hugely massive black holes were already full—grown when the universe was very young, less than a tenth of its present age.”
Black holes grow by sucking in gas. This forms a disc around the hole and spirals in, but usually so slowly that the holes could not have grown to these huge masses in the entire age of the universe. `We needed a faster mechanism,’ says Chris Nixon, also at Leicester, “so we wondered what would happen if gas came in from different directions.”
Nixon, King and their colleague Daniel Price in Australia made a computer simulation of two gas discs orbiting a black hole at different angles. After a short time the discs spread and collide, and large amounts of gas fall into the hole. According to their calculations black holes can grow 1,000 times faster when this happens.
“If two guys ride motorbikes on a Wall of Death and they collide, they lose the centrifugal force holding them to the walls and fall,” says King. The same thing happens to the gas in these discs, and it falls in towards the hole.
This may explain how these black holes got so big so fast. “We don’t know exactly how gas flows inside galaxies in the early universe,” said King, “but I think it is very promising that if the flows are chaotic it is very easy for the black hole to feed.”
The two biggest black holes ever discovered are each about ten billion times bigger than the Sun.

thequantumlife:

Astronomers put forward new theory on size of black holes

Professor Andrew King from the Department of Physics and Astronomy, University of Leicester, said: “Almost every galaxy has an enormously massive black hole in its centre. Our own galaxy, the Milky Way, has one about four million times heavier than the sun. But some galaxies have black holes a thousand times heavier still. We know they grew very quickly after the Big Bang.”

“These hugely massive black holes were already full—grown when the universe was very young, less than a tenth of its present age.”

Black holes grow by sucking in gas. This forms a disc around the hole and spirals in, but usually so slowly that the holes could not have grown to these huge masses in the entire age of the universe. `We needed a faster mechanism,’ says Chris Nixon, also at Leicester, “so we wondered what would happen if gas came in from different directions.”

Nixon, King and their colleague Daniel Price in Australia made a computer simulation of two gas discs orbiting a black hole at different angles. After a short time the discs spread and collide, and large amounts of gas fall into the hole. According to their calculations black holes can grow 1,000 times faster when this happens.

“If two guys ride motorbikes on a Wall of Death and they collide, they lose the centrifugal force holding them to the walls and fall,” says King. The same thing happens to the gas in these discs, and it falls in towards the hole.

This may explain how these black holes got so big so fast. “We don’t know exactly how gas flows inside galaxies in the early universe,” said King, “but I think it is very promising that if the flows are chaotic it is very easy for the black hole to feed.”

The two biggest black holes ever discovered are each about ten billion times bigger than the Sun.

quantumaniac:

The Most Powerful Laser in the World
The National Ignition Facility inside of the Lawrence Livermore National Laboratory is home to the most powerful laser in the world. 192 infrared laser beams are concentrated into a single beam of enormous ultraviolet energy, that in March 2012 broke the world record and topped out at more than two million joules of energy. 
The previous record was an easily trumped 1.6 million joule laser, but this focused beam started first at 1.875 million (mega) joules - and was later bumped up to the final record. Eventually, the laser will be able to fire 15 times per second! 
What could scientists use such a powerful laser for? Well, the goal is to produce a nuclear fusion reaction by fusing hydrogen isotopes. Nuclear fusion, the same reaction that occurs on stars, will eventually take place via this laser! 

quantumaniac:

The Most Powerful Laser in the World

The National Ignition Facility inside of the Lawrence Livermore National Laboratory is home to the most powerful laser in the world. 192 infrared laser beams are concentrated into a single beam of enormous ultraviolet energy, that in March 2012 broke the world record and topped out at more than two million joules of energy. 

The previous record was an easily trumped 1.6 million joule laser, but this focused beam started first at 1.875 million (mega) joules - and was later bumped up to the final record. Eventually, the laser will be able to fire 15 times per second! 

What could scientists use such a powerful laser for? Well, the goal is to produce a nuclear fusion reaction by fusing hydrogen isotopes. Nuclear fusion, the same reaction that occurs on stars, will eventually take place via this laser! 

The most exciting phrase to hear in science, the one that heralds the most discoveries, is not “Eureka!” [I found it!], but “That’s funny…”

Isaac Asmiov

Any dot or mark that you see is an entire galaxy, there are around 200,000,000,000 galaxies in the universe, every galaxy containing billions of stars, each star possibly having some planets in orbit.
Isn’t science truly fascinating?

Any dot or mark that you see is an entire galaxy, there are around 200,000,000,000 galaxies in the universe, every galaxy containing billions of stars, each star possibly having some planets in orbit.


Isn’t science truly fascinating?

cosmictoquantum:

New Theory on Size of Black Holes: Gas-Guzzling Black Hole Eats Two Courses at a Time

Astronomers have put forward a new theory about why black holes become so hugely massive — claiming some of them have no ‘table manners’, and tip their ‘food’ directly into their mouths, eating more than one course simultaneously.
Researchers from the UK and Australia investigated how some black holes grow so fast that they are billions of times heavier than the sun.
The team from the University of Leicester (UK) and Monash University in Australia sought to establish how black holes got so big so fast.
Professor Andrew King from the Department of Physics and Astronomy, University of Leicester, said: “Almost every galaxy has an enormously massive black hole in its center. Our own galaxy, the Milky Way, has one about four million times heavier than the sun. But some galaxies have black holes a thousand times heavier still. We know they grew very quickly after the Big Bang.”
“These hugely massive black holes were already full—grown when the universe was very young, less than a tenth of its present age.”
Black holes grow by sucking in gas. This forms a disc around the hole and spirals in, but usually so slowly that the holes could not have grown to these huge masses in the entire age of the universe. `We needed a faster mechanism,’ says Chris Nixon, also at Leicester, “so we wondered what would happen if gas came in from different directions.”
Nixon, King and their colleague Daniel Price in Australia made a computer simulation of two gas discs orbiting a black hole at different angles. After a short time the discs spread and collide, and large amounts of gas fall into the hole. According to their calculations black holes can grow 1,000 times faster when this happens.
“If two guys ride motorbikes on a Wall of Death and they collide, they lose the centrifugal force holding them to the walls and fall,” says King. The same thing happens to the gas in these discs, and it falls in towards the hole.
This may explain how these black holes got so big so fast. “We don’t know exactly how gas flows inside galaxies in the early universe,” said King, “but I think it is very promising that if the flows are chaotic it is very easy for the black hole to feed.”
The two biggest black holes ever discovered are each about ten billion times bigger than the Sun.
Their research is due to published in the Monthly Notices of the Royal Astronomical Society. The research was funded by the UK Science and Technology Facilities Council.

cosmictoquantum:

New Theory on Size of Black Holes: Gas-Guzzling Black Hole Eats Two Courses at a Time

Astronomers have put forward a new theory about why black holes become so hugely massive — claiming some of them have no ‘table manners’, and tip their ‘food’ directly into their mouths, eating more than one course simultaneously.

Researchers from the UK and Australia investigated how some black holes grow so fast that they are billions of times heavier than the sun.

The team from the University of Leicester (UK) and Monash University in Australia sought to establish how black holes got so big so fast.

Professor Andrew King from the Department of Physics and Astronomy, University of Leicester, said: “Almost every galaxy has an enormously massive black hole in its center. Our own galaxy, the Milky Way, has one about four million times heavier than the sun. But some galaxies have black holes a thousand times heavier still. We know they grew very quickly after the Big Bang.”

“These hugely massive black holes were already full—grown when the universe was very young, less than a tenth of its present age.”

Black holes grow by sucking in gas. This forms a disc around the hole and spirals in, but usually so slowly that the holes could not have grown to these huge masses in the entire age of the universe. `We needed a faster mechanism,’ says Chris Nixon, also at Leicester, “so we wondered what would happen if gas came in from different directions.”

Nixon, King and their colleague Daniel Price in Australia made a computer simulation of two gas discs orbiting a black hole at different angles. After a short time the discs spread and collide, and large amounts of gas fall into the hole. According to their calculations black holes can grow 1,000 times faster when this happens.

“If two guys ride motorbikes on a Wall of Death and they collide, they lose the centrifugal force holding them to the walls and fall,” says King. The same thing happens to the gas in these discs, and it falls in towards the hole.

This may explain how these black holes got so big so fast. “We don’t know exactly how gas flows inside galaxies in the early universe,” said King, “but I think it is very promising that if the flows are chaotic it is very easy for the black hole to feed.”

The two biggest black holes ever discovered are each about ten billion times bigger than the Sun.

Their research is due to published in the Monthly Notices of the Royal Astronomical Society. The research was funded by the UK Science and Technology Facilities Council.

rhamphotheca:

Researchers create computer simulations of primordial black holes striking the Earth
by Bob Yirka
Black holes have captured the imagination of scientists and amateur enthusiasts for years. The idea of some dark entity out there in the far reaches of space sucking up anything and everything that ventures near with such power and force that even light can’t escape it’s clutches, both enthralls and terrifies. Thus, the idea of one moving close enough to our planet would seem good reason to hit the panic button. But, in some cases, it appears, it might not be such a bad thing, at least if it were very, very small. That’s what one small group of researchers has concluded after simulating the effects of one tiny black hole hitting and passing through the Earth, on a computer…
(read more: PhysOrg)    
(image: This artist’s concept shows a galaxy with a supermassive black hole at its core. The black hole is shooting out jets of radio waves, credit: NASA/JPL-Caltech)
_________________________
More information: Detectable seismic consequences of the interaction of a primordial black hole with Earth, arXiv:1203.3806v1 [astro-ph.CO]
http://arxiv.org/abs/1203.3806

rhamphotheca:

Researchers create computer simulations of primordial black holes striking the Earth

by Bob Yirka

Black holes have captured the imagination of scientists and amateur enthusiasts for years. The idea of some dark entity out there in the far reaches of space sucking up anything and everything that ventures near with such power and force that even light can’t escape it’s clutches, both enthralls and terrifies. Thus, the idea of one moving close enough to our planet would seem good reason to hit the panic button. But, in some cases, it appears, it might not be such a bad thing, at least if it were very, very small. That’s what one small group of researchers has concluded after simulating the effects of one tiny black hole hitting and passing through the Earth, on a computer…

(read more: PhysOrg)    

(image: This artist’s concept shows a galaxy with a supermassive black hole at its core. The black hole is shooting out jets of radio waves, credit: NASA/JPL-Caltech)

_________________________

More information: Detectable seismic consequences of the interaction of a primordial black hole with Earth, arXiv:1203.3806v1 [astro-ph.CO]

http://arxiv.org/abs/1203.3806